Research Article | OPEN ACCESS
Research on Direct Shear Test of Undisturbed Root-soil Composition
Heng-Lin Xiao, Gang Huang, Qiang Ma, Jing Zhu and Rui Hong
School of Civil Engineering and Architecture, Hubei University of Technology, China
Research Journal of Applied Sciences, Engineering and Technology 2014 6:1183-1186
Received: March 08, 2013 | Accepted: April 05, 2013 | Published: February 15, 2014
Abstract
In order to further study the soil reinforcement of roots on the quantitative analysis of “reinforced†soil, to understand the effect of plant roots on the soil shear strength. direct shear test was employed to investigate the shear displacement and stress force relationship of the undisturbed soil and disturbed soil without root located at An Shan Kou, Ba Mao Di, Hun He Di and Duo Hua Mulan Di and the shear strength of the average root content of soil was discussed, as well. The results show that the cohesion of the undisturbed soil is significantly greater than that of the disturbed soil without root, under the condition of the average root content of 0.945% at An Shankou, 1.154% at Ba Mao Di, 0.4425% at Hun He Di, 1.1725% at Duo Hua Mulan Di. The increase of cohesion is respectively 5.05, 17.19, 36.93, 31.84%; and the increase of inner friction angle is not obvious with the increase of root content, soil cohesion increase, the shear strength thus increases. Compared with the herbaceous roots, the grass-shrub mixed plant roots system can improve the shear strength of the soil more effectively.
Keywords:
Disturbed soil without root, direct shear test, ecology protection of slope, moisture content, undisturbed soil,
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Competing interests
The authors have no competing interests.
Open Access Policy
This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Copyright
The authors have no competing interests.
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